Thank you for the update. Glad to hear the Sony is handling them well. I thought it very likely, as the nearly identical Lite-on iHBS112 drive did very well with them. I also tried Burnplot a long time ago,
Opti drive control yields a slightly better ImgBurn graphical image IMHO. You can likely also use ODC to do a disc quality/error rate scan with your new drive to test recording quality at different burn speeds. If your drive is based on the newer iHBS112-04, you may need to use a little
trick to make this function work. 4x scanning speed seems to correlate best for me to real-world playback performance. While a playback test is certainly the gold standard for recorded video testing, the error rate test shows a distinct correlation to playback performance. I have found that above a certain error level, playback issues may start to be seen. Of course a read speed/TRT test is also very good at detecting high error rates on a BD-R. Your verify speed looks immaculate, so any other testing might be more for adventure than necessity
.